Bone conduction speaker and compound vibration device thereof

Abstract

The present invention relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present invention and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.

What is claimed is: 
     
       1. An acoustic output apparatus, comprising:
 a vibration device having a vibration conductive plate and a vibration board, wherein the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone; and 
 an interactive control component configured to allow an interaction between a user and the acoustic output apparatus. 
 
     
     
       2. The acoustic output apparatus of  claim 1 , wherein the interactive control component comprises at least one of:
 a button control module, configured to control the acoustic output apparatus based on an instruction input by the user through buttons; 
 a voice control module, configured to control the acoustic output apparatus based on a voice control instruction received from the user; 
 a posture control module, configured to control the acoustic output apparatus based on a posture of the user; 
 an auxiliary control module, configured to control the acoustic output apparatus based on a working state of the acoustic output apparatus; and 
 an indication control module, configured to indicate a working state of the acoustic output apparatus. 
 
     
     
       3. The acoustic output apparatus of  claim 2 , wherein the voice control module comprises:
 a receiving unit, configured to receive the voice control instruction from the user; 
 a processing unit, configured to generate an instruction signal based on the voice control instruction; 
 a recognition unit, configured to identify whether the instruction signal matches a preset signal; and 
 a control unit, configured to control the acoustic output apparatus based on the instruction signal and a matching result. 
 
     
     
       4. The acoustic output apparatus of  claim 1 , further comprising one or more sensors configured to detect status information of the user, wherein the one or more sensors include at least one of a locating sensor, an orientation sensor, an inertial sensor, an audio sensor, and a wireless transceiver. 
     
     
       5. The acoustic output apparatus of  claim 4 , wherein the one or more sensors detect a point of interest (POI) that the user is proximate to or facing towards. 
     
     
       6. The acoustic output apparatus of  claim 1 , further comprising a controller configured to cause the vibration device to output sound based on the detected status information of the user. 
     
     
       7. The acoustic output apparatus of  claim 6 , wherein to cause the vibration device to output sound based on the detected status information of the user, the controller is further configured to
 determine an audio message related to the POI; and 
 cause the earphone core to replay the audio message upon the detection of the POI by the one or more sensors. 
 
     
     
       8. The acoustic output apparatus of  claim 7 , wherein the POI is a virtual audio marker with which the audio message is associated. 
     
     
       9. The acoustic output apparatus of  claim 1 , wherein the vibration device outputs sound through one or more sound guiding holes set on the acoustic output apparatus. 
     
     
       10. The acoustic output apparatus of  claim 1 , further comprising an active noise reduction module configured to generate an anti-noise acoustic signal to reduce noise. 
     
     
       11. The acoustic output apparatus of  claim 1 , wherein the vibration conductive plate includes a first torus and at least two first rods, the at least two first rods converging to a center of the first torus. 
     
     
       12. The acoustic output apparatus of  claim 11 , wherein the vibration board includes a second torus and at least two second rods, the at least two second rods converging to a center of the second torus. 
     
     
       13. The acoustic output apparatus of  claim 12 , wherein the first torus is fixed on a magnetic component. 
     
     
       14. The acoustic output apparatus of  claim 13 , further comprising a voice coil, wherein the voice coil is driven by the magnetic component and fixed on the second torus. 
     
     
       15. The acoustic output apparatus of  claim 14 , wherein the at least two first rods are staggered with the at least two second rods. 
     
     
       16. The acoustic output apparatus of  claim 15 , wherein a staggered angle between one of the at least two first rods and one of the at least two second rods is 60 degrees. 
     
     
       17. The acoustic output apparatus of  claim 14 , wherein the magnetic component comprises:
 a bottom plate; 
 an annular magnet attaching to the bottom plate; 
 an inner magnet concentrically disposed inside the annular magnet; 
 an inner magnetic conductive plate attaching to the inner magnet; 
 an annular magnetic conductive plate attaching to the annular magnet; and 
 a grommet attaching to the annular magnetic conductive plate. 
 
     
     
       18. The acoustic output apparatus of  claim 1 , wherein the vibration conductive plate is made of stainless steels and has a thickness in a range of 0.1 to 0.2 mm. 
     
     
       19. The acoustic output apparatus of  claim 1 , wherein a lower resonance peak of the at least two resonance peaks is equal to or lower than 900 Hz. 
     
     
       20. The acoustic output apparatus of  claim 19 , wherein a higher resonance peak of the at least two resonance peaks is equal to or lower than 9500 Hz.